"java.lang.ClassNotFoundException: org/jemepg/empeg/manager/Main "
did you type this line or copy-and-paste it, because it says "jemepg" instead of "jempeg" in it .... But it doesn't match the other line, which IS spelled right. This looks like it should work. Must be something funky with InstallAnywhere. I'm going to put up new installers for 54 sometime soon, so you can try those when I do.